Pile-cutting mechanism fob



A. VELUARD.

PILE CUTTING MECHANISM FOR LOOMS.

' APPLICATION FILED DEC. 11. 1912.

1,3QZ,657D Patented Nov. 25, 1919.

3 SHEETSSHEET l.

VELUARD.

NG MECHANISM FOR LOGMS.

APPLICATION FILED DEC.H.19I.

FILE CUT Patented NOV. 25, 193$;

3 SHEETS-SHEET 2.

A. VELUARD.

PILE CUTTING MECHANISM FOR LOOMS.

APPLICATION FILED DEC.1i, 191a.

L fififi'l Patented Nov. 25, 1919.

3 SHEETS-SHEET 3- UNTTED STA ENT @FFTQE.

Arman VELUARD, or PHILADELPHIA, PENNSYLVANIA.

FILE-CUTTING MECHANISM FOR LOOIVIS.

manner.

To aZZ whom it may concern: V

Be it known that I, ANDRE VELUARD, citizen of the United States, residing in Philadelphia, Pennsylvania, have invented cere tain new and useful Improvements in Pile- Cutting Mechanism for Looms, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification. I

My invention relates to improvements in pile cutting mechanism for looms for weaving pile fabric wherein the pile floats are formed over wires which extend in the direction of the warp and which direct the pile or floats to the cutting devices.

t The object of my invention is to provide a novel, simple and efficient pile or float cutting mechanism having self sharpening cutting knives; and to this end the invention consists in the novel construction, combination and arrangement of parts whereby advantages are gained, as will be hereinafter described and claimed.

In the accompanying drawings, illustrating my invention, 7 v I Figure 1 is a vertical section of parts of a V loon'i provided with a pile cutting mechanism embodying my invention.

Fig. 2 is a'plan view of the pile or float cutting devices and supporting and actuating devices associated therewith.

Figs. 3 and 4 are sectional details of the parts shown in Fig,- 2, on lines 33 and el4, respectively, of Fig. 2.

Fig. 5 is a sectional detail of the parts shown in Fig. 2, on line 55 of Fig. 2, showing one of the cutting devices in side view,

Fig. 6 is a side view of a part of one of the cutting devices, showing the cutting knife and its carrying member moved to another position.

Fig. 7 is a view 'of the cutting device as green from the side opposite to that shown in Fig. 8 is a transverse section through the cutting device, enlarged, on line 88 of -Fig. 7.

Fig. 9 is a plan view of the cutting device.

Referring to the drawings, 2 designates the loom frame, 7 the breast beam, 9 the take-up roller for the woven fabric, and 10 the lay. Each end portion of the lay 10 is Specification of Letters Patent.

Application filed December 11, 1918.

Patented Nov. 25, 1919., Serial No. 266,203.

which will be hereinafter described. The

rearward ends of the wires 17 pass over a bar 18 and extend downwardly therefrom, each having a weight 19 attached to the lower end thereof to keep it taut and to take up the slack when it is raised and lowered by the harness 15, during the weaving operation.

The parts thus far described are common and well known to persons skilled in this art, and no detailed description or illustration thereof is deemed necessary herein.

Each pile wire 17 of the loom is connected to a pile or float cutting device which it shall now describe.

20 designates the body portion of the device, constituting the support for the other elements thereof and being preferably.

formed of sheet metal bent to form a downwardly facing top groove 21 and an upwardly facing bottom groove 22. The walls of the grooves 21 and 22 are connected at one side of the device by a side wall 23. Pro. jecting forwardly from the bottom of one end of the body portion 20 is a slender arm 24, the apertured end of which is connected to the forward end of a pile wire 17. This arm 24 forms, in effect, a continuation of the wire 17, and it is adapted to receive the pile or floats formed overthe wire as rapidly as the fabric is produced and advanced by the loom.

The body portion 20 of each cutting device rests upon a bar 25 which is secured on the breast beam 7; and extending forwardly from the body portion 20 is an arm 26 which rests upon a bar 27. The bar 27 is secured to a bar 28 by means of screws 29, and it is held a slight distance above the bar 28 by washers 30 surrounding the screws 29 and interposed between the bars 27 and 28. The bars 27 and 28 extend parallel to the bar 25 and the breastbeam 7, and the bar 28 35 devices.

is secured to the breast beam. The arm '26 is formed of sheet-metal and its rearward end is suitably secured within the grooves 21 and 22 of the body portion 20 by in denting the body portion, at 31, as shown.

The forward end of the arm 26 has a downwardly extending vertical portion 32 which is seated within one of a seriesof vertical grooves 33 in the forward face of the bar 27; and the vertical portion 32 has a projection 34 which extends rearwardly beneath the bar 27. Thus the arm 26 embraces the forward portion of the bar 27 which prevents vertical displacement of the arm. The

walls of the groove 33 in which the vertical portion 32 of the arm 26 is seated maintain the arm 26 and body portion in vertical position. Displacement of the vertical portions 32 0f the arms 26 of the cutting de- 20 vices from the grooves 33 is prevented by a strip of leather or other suitable yielding material 35 which bears against the forward edges of the arms 26 and which is seated in a, groove in the rearward face of a bar 3'6 which extends parallel to the bar 27. The

bar 316 rests upon a bar 37 whichis 'supported by arms 38 projecting forwardly from brackets 39 which are secured to the ends of the bars 25 and 28; and the bar 37 is provided withupwardly projecting bolts J secure it in positions of adjustment. The

grooves 33 not only maintain thecutting 40 devices in vertical position but they also maintain them in lation. Each cutting device is provided with a plate-like member 43 which extends into and proper lateral. spaced rebetween the grooves 21 and 22 and which is fitted to slide longitudinally therein. The member 43 is provided with an arm 44 which extends rearwardly' adjacent to the wall '23 of the body portion 20; and ar- 5 ranged between the wall 23 and arm 44 is a plate-like knife 45 mounted to turn. on a pivot pin or stud 46 which projects fixedly from the arm 44. When it is desired to remove the knife 45, the arm 44 is sprung outwardly from the wall 23 to withdraw the stud 46 from the opening in the knife 45. The free end. of the stud 46 extends beyond the knife 45 and enters a slot 47 in the wall 23 to prevent any accidental springing of the parts from withdrawing the stud 46 from the opening in the knife 45.

The lower portion of the knife 45 is provided with a cutting edge 48 which follows a curved line concentric with the pivot stud .65 46; and the upper portion of the knife 45 transversely extending pin or projection, 50

on the side wall 23 of the support 20. When the member 43 is reciprocated on the support, from the position shown in Fig. 5 to the position shown in Fig. 6, and back is provided with a slot 49 which receives a i again, the knife 45 will be b odily carried by the member 43, and the e-n-.

drawings. The cutting edge 48 of the knife f is beveled toward the sharpening edge 51, and it is pressed into engagement there- -With by a spring arm 52 which projects from the member 43 and bears against one side of the knife 45. When the knife 45 is actuated, as hereinbefore described, its cutting edge 48 will beautomatically sharpened by its engagement with the sharpening edge 51 in a scissors-like action; but

differing therefrom in resultant effect in that the grinding moveinentis a compound movement which lmparts to the cutting edge being sharpened a sweeping movement over the sharpening surface, in a curved line, due to the ivotally rotative reciprocation of the kni e on the carryingmember and the bodily movement of the knife by the movable member, a mode of operation wholly impossible if the knife had one con-- tacting movement only and on a fixed pivot, and producing a sharpening efi'ect different in result, if not in character. It will be observed that,. owing to the movement of the pivot stud 46-with relation to the sharp; ening edge 51, during the actuation of the knife 45, the point of engagement of the cutting edge 48 with the sharpening edge 51 will be constantly changing, thus increasing the efiectiveness of the sharpening e ge.

The pile or floats to be out are advanced from the wires 17 to and along the arms 24 of the cutting devices, and in order that the plle or float threads shall not be stretched by engagement with the sharpening wall 51 they are cut at a point rearwardly of the thereof, providing upwardly diverging side essee? walls for the slot 19, so that, duringthe initial movement of the member 4E3 from the position shown in Fig. 6 to the position shown in Fig. 5, the knife 45 will be carried bodily thereby without being moved about the axis of its pivot 46 until the wall of the slot 49 engages the pin 50.

I shall now describe the mechanism for reciprocating the members 43 to actuate the knives 45.

The upper portion of each member 13 has a notch 53 cut therein for the reception of a rib 54 projecting downwardly from a bar 55 which extends above the cutting devices and parallel to the bar 27. The ends of the bar 55 are removably secured to flanges 56 which project from two slide blocks 57 between which the bar 55 extends. The blocks 57 are slidably fitted to the brackets 39, hereinbefore referred to, in a manner to permit them to slide in the direction of the movement of the knife carrying members 43. Suitable removable top bars 58, held in place upon the brackets 39 by cap screws 59 hold the blocks 58 in place within their guide openings in the brackets 39 and permit their removal therefrom when the bars 53 are removed. The blocks 57 are provided with outwardly projecting pivot studs 60 which receive the forward ends of links 61. The rearward ends of the links 61 are pivoted to the upper arms 62 of levers 63 which are fulcrumcd, at 64, on the brackets 39. The lower arms 65 of the levers 63 are pivoted to the forward ends of links 66 which have their rearward ends pivoted to brackets 67 which are secured to and project from the lay 10, as shown inFig. 1, whereby, when the lay 10 is reciprocatec, during the weaving operation, the blocks 57 and bar 55 will be reciprocated, causing the rib 5 1 to reciprocate the members 4:3 for the actuation of the knives 15, as hereinbefore explained.

The body portions 20 of the cutting devices are cut out, at 69,, to receive the rib 5t;

. and the movement of the blocks 57 is limited by the innerends of adjustable stop screws 70 which are screwed into the brackets 39 and between which the blocks 57 are moved.

The arm 65 of the lever 63 is made, in two parts which are held together by screws 71 extending through slots therein. By loosening the screws 71 and adjusting the two parts of the arm 65 longitudinally relatively 'to each other the arm may be shortened or lengthened to vary the extent of movement of the blocks 57 by the lay 10, and thus the extent of movement of the knife carrying members43 may be nicely regulated for the proper actuation of the knives 45.

As the fabric 16 is produced by the loom, it is advanced over a bar 72, supported by the breast beam 7, and passes down between the bar 7 2 and breast beam 7 to the take-up roller 9, thereby drawing the pileor floats frame, and means to impart a compound movement to the knives, consisting of a series of knife-supporting devices movable longitudinally in said grooved bars and pivotally supporting" the knives, said knives and said bars having coiiperating parts operating to move said knives on their pivots simultaneous with and additional to the longitudinal mbvement imparted to them by the knife-supporting devices when the latter are moved, and connecting actuating means between the lay and said knife-supporting devices 9 whereby the knives are actuated when the lay is actuated.

2. Tn a loom for weaving pile fabrics, the combination with a loom frame, a lay and with means to actuate the lay, of a series of grooved bars fixedly supported in the frame, a series of knife-supporting devices movable longitudinally in said grooved bars, connecting actuating means to move said devices coincident with the movement of the lay, a

ed in said devices, each of said knives having a cutting edge which follows a curved line concentric with the stud on which it is pivoted, and coiiperating means between the knifeand the grooved bar whereby the knife has a rotative reciprocatory movement imparted .to it simultaneous with its longitudinal movement effected by the movement of its supporting device.

3. In a loom for weaving pile fabrics, the combination of a loom frame including a breast beam, pile cutting knives, supports for the knives, brackets secured to the breast beam and having guideways formed therein, blocks slidably fitted to the guideways, an actuating bar for the knives carried by the blocks, levers fulcrumed on the frame, links connecting the levers and the blocks, and means operative to actuate the levers.

4. In a loom for Weaving pile fabrics, the combination of a loom frame including a breast beam, a lay, means operative to actuate the lay, pile cutting knives, supports for the knives, brackets secured to the breast beam and having guideways formed therein, blocks slidably fitted to the guideways, an. actuating bar for the knives carried by the blocks, levers fulcrumed on the frame, links connecting the levers and the blocks, and

links connecting the levers and the lay, 'Whereby when the lay is actuated the bar will be actuated.

5. In a loom for weaving pile fabrics, the combination of a loom frame, a bar support ed by the frame and having a series of grooves therein. a series of pile cutting devices seated in the grooves, and means to prevent displacement of the cutting devices from the grooves. v

.6. In a loom for Weaving pile fabrics, the combination of a loom'frame, a bar supported by the frame and having a series of grooves therein, a series of pile cutting devices embracing the bar and seated in the grooves thereof, and means to prevent displacement of the cutting devices fromthe Y combmation of a support havlng a slot grooves.

' 7. In aloom for weaving pile fabrics, the combination of a loom frame, a bar supported by the frame and having a series of grooves therein, a series of pile cutting devices seated in the grooves, and a removable clamp bar supported by the frame and clamping the cutting devices within the grooves.

, 8. In a pile fabric cutting device, the combination with a guiding support fixedly mountedon the loom frame and having a' part adapted to receive the pile loops and direct them to the cutting edge of a knife carried thereby, a guided member longitudinally movable on said support, and a knife pivoted to said member, said knife and said support having cooperating parts operating to cause said knife to move .on its pivot additional to its longitudinal movement by and with said movable supporting-member.

9. In a pile fabric cutting device, the combination with a fixed support, having a part adapted to receive thepile loops and direct them to the cutting edge of a knife carried thereby, a member movable longitudinally on the support, and a knife pivoted to the member and having a slotted extension, said support having a pin projecting into said slot in the knife and adapted to co-act with the Walls thereof to rotatably reciprocate the knife on its pivot whenthe knife is moved.

longitudinally by its longitudinally movable supporting member.

10. In a pile fabric cutting device, the combination of a support, a member movable on the support, a knife, and an arm carried by said member andhaving a pivot pin penetrating the knife and pivotally supporting the same, said arm being movable relatively to the knife to withdraw the pivot pin therefrom, said knife and said support having cooperating parts causing said knife to move on said pivot pin when said member carrying said arm is moved, and said support having a part adapted to receive the pile and direct it to the cutting edge of the knife,

11. In a pile fabric cutting device, the combination of a support, a member movable on the support, and a knife pivoted to the member and having a slot therein, and an arm carried by-said member and having a pivot pin penetrating the knife and pivce1ve the pile and direct itto the cutting" edge of the knife.

12. In a pile fabric cutting device, the

and having a pivot pin penetrating. said knife and entering said slot and pivotally supporting the knife between said arm and said support, said arm being movble relatively to the knife to withdraw the pivot pin therefrom, said knife and. said support having cooperating parts causing said knife to move on said pivot pin when said member carrying said arm is moved, and said support having a part adapted to receive the pile and direct it to the cutting edge of the knife. r

13. In a pile fabric cutting device, the combination of a fixed support, a member movable longitudinally on the support, and a knife pivoted to said member,-said knife and said support having cooperating parts operating to cause said knife to move on its pivotsimultaneous with but additional to its longitudinal movement by said member, said support having a part adapted to engage the knife along the cutting edge thereof and sharpen the same when the knife and knife-carrying member are moved relatively to the support.' Y L a 14. In a pile fabric cutting device, the combination of a fixed support, a member re-- ciprocating longitudinally on the support, and a knife pivoted to said member and hav ing a cutting edge on a curved line concentric with the stud on which it is pivoted, said knife and said support having cooperating parts operating to rotatively reciprocate said knife on its pivotal bearing simultaneous with and additional to its longitudicurved cutting edge, said knife and said sup port having cooperating parts operating to rotatively reciprocate said knife on its pivot when longitudinally moved by and with said 5 member and also permitting said knife to be moved a limited distance 10 into sharpening engagementwith the cutting edge of the knifevvhen said knife and knife-supportmg member are operatively actuated.

In testimony whereof; I have hereunto/ afiixed my signature this 9th day of December, A. D. 1918.

ANDRE VELUARD.

Witnesses:

I. M. TUNIs ALEXANDER ARK. 

